retain history of header link clicks

close: #196

layouts/partials/footer.html

@@ -48,7 +48,7 @@
             if (id === "top") {
                 history.replaceState(null, null, " ");
             } else {
-                history.replaceState(null, null, `#${id}`);
+                history.pushState(null, null, `#${id}`);
             }
         });
     });